can anyone advise me of the engineer's code to work on a Optima XM home alarm system.

alan thornton, April 2007

The default engineering code for the Optima XM is 9999. (This may have been previously changed and if so, it could be any combination)

To get into 'Engineer Programming' mode:
From Day, press PROG and enter your setting code. (Day & Tamper LEDs show). Press PROG again and enter 9999. ( Day & Attack LEDs show). You are now in Engineer Programming mode.

Spyder, April 2007

On the optima xm the engineer code is fixed to 9999 and cannot be changed!

johnny, April 2007

Prog 9999 is the default, but it could have been altered.

Pete, April 2007